#3F400B#3F400B

#3F400B is a dark, moderate yellow. Relative luminance 0.047; OKLCH L 35.9% C 0.071 H 110.6°. Best body text is #FFFFFF at 10.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F400B
RGB	rgb(63, 64, 11)
HSL	hsl(61, 71%, 15%)
HSV	hsv(61, 83%, 25%)
CMYK	cmyk(1.6%, 0%, 82.8%, 74.9%)
CIE-LAB	lab(26.00, -7.95, 30.19)
CIE-LCH	lch(26.00, 31.22, 104.76°)
OKLab	oklab(35.94% -0.025 0.0666)
OKLCH	oklch(35.94% 0.071 110.6)
XYZ	xyz(3.9438, 4.7478, 1.0252)
Luminance	0.0475 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F400B #0C0B40

analogous

#40270B #3F400B #25400B

triadic

#3F400B #0B3F40 #400B3F

tetradic

#3F400B #0B4027 #0C0B40 #400B25

square

#3F400B #0B4027 #0C0B40 #400B25

split-complementary

#3F400B #0B2540 #270B40

monochromatic

#1A1A04 #1A1A04 #3F400B #727414 #A6A81D

Accessibility & contrast

On white

10.77

#3F400B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#3F400B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F400B

10.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F400B	#FFFFFF	#000000	##FFFFFF
##3F400B	1.00	10.77	1.95	10.77
#FFFFFF	10.77	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#463D03

Deuteranopia (green-blind)

#463E0F

Tritanopia (blue-blind)

#443B36

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #3f400b;
/* rgb */ color: rgb(63, 64, 11);
/* oklch */ color: oklch(35.9% 0.071 110.6);

Tailwind

colors: {
  custom: {
    50: '#76744f',
    500: '#3f400b',
    950: '#000000',
  },
}

SCSS

$custom: #3f400b;
$custom-light: #76744f;
$custom-dark: #000000;

JSON

{
  "hex": "#3f400b",
  "rgb": {
    "r": 63,
    "g": 64,
    "b": 11
  },
  "hsl": {
    "h": 61.132,
    "s": 70.667,
    "l": 14.706
  },
  "oklch": {
    "l": 0.35937,
    "c": 0.07111,
    "h": 110.6
  },
  "luminance": 0.04748
}

Semantic roles & 50–950 ramp

primary

#3F400B

secondary

#2C2A7D

accent

#3AED3E

background

#F7F7F4

surface

#EDEDE7

border

#C8C8C3

text

#090802

muted

#7B7B78

Preview Lab

Preview with #3F400B

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →